Alloy



Patented Sept. 30, 1930 UNITED STATES PATENT OFFICE L ANDREW GUST A.VE KRANS, LOS ANGELES, CALIFORNIA, ASSIGNOB OF ONE-m1 '10 JOHN S. KIRSTEIN, OF LOS ANGELES, CALIFORNIA ALLOY No Drawing.

This invention relates to alloys and, more particularly, those containing a relatively large percentage of copper.

An object of the invention is the produc- 5 tion of an alloy having a greater tensile strength than steel, one that exactly matches the color of gold, and one that does not tarnish or oxidize to a sufiicientextent to destroy 7 its brightness. 10 This alloy is capable of use for the production of cutlery and jewelry.

Another object of the invention is to provide an alloy which can be "made to closely imitate various gold tone colors by a variation in the amount of one of the ingredients.

Other objects and advantages will appear in the subjoined detailed description.

The metals employed in the production of this alloy are copper, tin, nickel, aluminum .20 and beryllium. These metals are melted together by placing them in a heated crucible, and the temperature employed ranges from approximately 2300 F. to 2400 F.

After the alloy thus produced has cooled, it will melt when raised to a temperature of approximately 1900 F.

Application filed July 26, 1929. Serial No. 881,403.

5 percent aluminum, from approximately th of 1 percent to 1 percent beryllium, and suificient copper to complete 100 percent.

Signed at Los Angeles, California, this 20th day of July,.1929.

ANDREW GUSTAV'E KRANS.

The above mentioned metals are used in the alloy in the following proportionate amounts: nickel approximately 1%, tin ap- 30 proximately A, to -1%, aluminum approximately 5%, beryllium from a proximately of 1% to 1%, and the ba ance' copper. l

These amounts are by weight.

The copper produces the gold tone, the tin 35 from approximately to 1' percent tin, a

60 proximately 1. percent nickel, approximate y brightens, the nickel and aluminum increase the tensile strength to some degree, and the The diflerent gold colors are secured by varying the amount of 

